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Mycologia, ASCOMYCOTINA, POLYSTIGMATALES, PHYLLACORACEAE .

Crops attacked: Cucurbitaceae .

Anthracnose disease

Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images

[R]Description
Brownish spots occur on the leaves and turn necrotic.
Round, sunken fruit lesions 1 to 2 cm diameter are first brown then black and covered with little dark spots.

[R]Biology
The fungus survives on plant debris, can persist up to 5 years on manure straw in the soil and is also present on seeds.
At infection, it penetrates the leaf cuticle directly.
Conidia, forming in the acervuli, are dispersed by splash and the running water following rain.
The fungus is also transmitted through the implements during the cultural activities and by certain pests.

[R]Epidemiology
Spores germinate at temperatures ranging from 5 to 30 °C.
Infection occurs after a period of high humidity : 24 hours with RH 100% and 19 - 24 °C. temperature are optimum conditions for disease development.
Symptoms appear the following week.

[R]Treatement
Proper ventilation of the glasshouses.
Contaminated seeds from contaminated fruits must not be used.
Destroy the wild cucurbits.

[R]Possible misleading
.

[R] Images

1. Colletotrichum lagenarium , Anthracnose disease (BASF)
   Anthracnose on melon Round, sunken browny black lesions on melons infected by anthracnose.
   

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